12-3n=-15-6n

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Solution for 12-3n=-15-6n equation: 



12-3n=-15-6n

We move all terms to the left:

12-3n-(-15-6n)=0

We add all the numbers together, and all the variables

-3n-(-6n-15)+12=0

We get rid of parentheses

-3n+6n+15+12=0

We add all the numbers together, and all the variables

3n+27=0

We move all terms containing n to the left, all other terms to the right

3n=-27

n=-27/3

n=-9

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